mirror of
https://github.com/python-pillow/Pillow.git
synced 2024-11-10 19:56:47 +03:00
90 lines
1.9 KiB
C
90 lines
1.9 KiB
C
/*
|
|
* The Python Imaging Library.
|
|
* $Id$
|
|
*
|
|
* coder for raw data
|
|
*
|
|
* FIXME: This encoder will fail if the buffer is not large enough to
|
|
* hold one full line of data. There's a workaround for this problem
|
|
* in ImageFile.py, but it should be solved here instead.
|
|
*
|
|
* history:
|
|
* 96-04-30 fl created
|
|
* 97-01-03 fl fixed padding
|
|
*
|
|
* Copyright (c) Fredrik Lundh 1996-97.
|
|
* Copyright (c) Secret Labs AB 1997.
|
|
*
|
|
* See the README file for information on usage and redistribution. */
|
|
|
|
|
|
#include "Imaging.h"
|
|
|
|
int
|
|
ImagingRawEncode(Imaging im, ImagingCodecState state, UINT8* buf, int bytes)
|
|
{
|
|
UINT8* ptr;
|
|
|
|
if (!state->state) {
|
|
|
|
/* The "count" field holds the stride, if specified. Fix
|
|
things up so "bytes" is the full size, and "count" the
|
|
packed size */
|
|
|
|
if (state->count > 0) {
|
|
int bytes = state->count;
|
|
|
|
/* stride must not be less than real size */
|
|
if (state->count < state->bytes) {
|
|
state->errcode = IMAGING_CODEC_CONFIG;
|
|
return -1;
|
|
}
|
|
state->count = state->bytes;
|
|
state->bytes = bytes;
|
|
} else
|
|
state->count = state->bytes;
|
|
|
|
/* The "ystep" field specifies the orientation */
|
|
|
|
if (state->ystep < 0) {
|
|
state->y = state->ysize-1;
|
|
state->ystep = -1;
|
|
} else
|
|
state->ystep = 1;
|
|
|
|
state->state = 1;
|
|
|
|
}
|
|
|
|
if (bytes < state->bytes) {
|
|
state->errcode = IMAGING_CODEC_CONFIG;
|
|
return 0;
|
|
}
|
|
|
|
ptr = buf;
|
|
|
|
while (bytes >= state->bytes) {
|
|
|
|
state->shuffle(ptr, (UINT8*) im->image[state->y + state->yoff] +
|
|
state->xoff * im->pixelsize, state->xsize);
|
|
|
|
if (state->bytes > state->count)
|
|
/* zero-pad the buffer, if necessary */
|
|
memset(ptr + state->count, 0, state->bytes - state->count);
|
|
|
|
ptr += state->bytes;
|
|
bytes -= state->bytes;
|
|
|
|
state->y += state->ystep;
|
|
|
|
if (state->y < 0 || state->y >= state->ysize) {
|
|
state->errcode = IMAGING_CODEC_END;
|
|
break;
|
|
}
|
|
|
|
}
|
|
|
|
return ptr - buf;
|
|
|
|
}
|